CN102769365A - Permanent magnet synchronous motor - Google Patents
Permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN102769365A CN102769365A CN2011102125900A CN201110212590A CN102769365A CN 102769365 A CN102769365 A CN 102769365A CN 2011102125900 A CN2011102125900 A CN 2011102125900A CN 201110212590 A CN201110212590 A CN 201110212590A CN 102769365 A CN102769365 A CN 102769365A
- Authority
- CN
- China
- Prior art keywords
- synchronous motor
- permanent magnet
- permagnetic synchronous
- magnetic groove
- stator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 41
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 7
- 150000002910 rare earth metals Chemical class 0.000 abstract description 7
- 230000005347 demagnetization Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention discloses a permanent magnet synchronous motor, which comprises a stator and a rotor, wherein a plurality of wire slots are formed in the stator along the circumferential direction, a plurality of magnetic slot groups are formed in the rotor along the circumferential direction, coils are arranged in the wire slots, and permanent magnets are arranged in the magnetic slot groups; the number of poles of the permanent magnet on the rotor is P, the distance between two adjacent magnetic slot groups is W, the tooth width of the stator is Lc, the number of the wire slots on the stator is S, 3PW/LcS is K, and K is more than or equal to 0.15 and less than or equal to 0.85. The invention can reduce the dependence on rare earth and improve the output torque of the permanent magnet synchronous motor from other aspects.
Description
Technical field
The present invention relates to a kind of permagnetic synchronous motor.
Background technology
Permagnetic synchronous motor includes stator and rotor, and rotor is provided with the magnetic groove, is placed with permanent magnet in the magnetic groove, in the course of the work, relies on permanent-magnet torque and reluctance torque to drive rotor rotation, shown in following formula:
T＝mp(L
q-L
d)i
di
q+mpψ
PMi
q
Wherein, first:
mp(L
q-L
d)i
di
q
Be reluctance torque, second:
mpψ
PMi
q
Be permanent-magnet torque, Ψ pm is the maximum of the rotor coupling magnetic flux of permanent magnet generation, and m is the number of phases of stator conductors, and Ld, Lq are respectively d axle and q axle inductance, and id, iq are the component of armature supply on d axle, q direction of principal axis;
Because permanent-magnet torque is maximum for the output torque T contribution of permagnetic synchronous motor; So; The current now practice is to adopt the method that improves permanent-magnet torque to improve permagnetic synchronous motor output torque T, and few people remove to promote the output torque T of permagnetic synchronous motor from the angle of reluctance torque;
And in fact, permanent-magnet torque depends on the performance of permanent magnet to a great extent, need use rare earth material in the course of processing of existing permanent magnet, and the use of rare earth material can cause environmental disruption, increases the cost of product, is unfavorable for the optimization utilization of resource.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, a kind of permagnetic synchronous motor is provided, the present invention can reduce the dependence to rare earth, considers to improve the output torque of permagnetic synchronous motor from other angle.
Its technical scheme is following.
A kind of permagnetic synchronous motor comprises stator and rotor, circumferentially is provided with a plurality of wire casings in the stator upper edge, in rotor, along circumferentially being provided with a plurality of magnetic groove groups, in wire casing, is provided with coil, in magnetic groove group, is provided with permanent magnet; The number of poles of permanent magnet is P on the rotor, and the spacing between adjacent two magnetic groove groups is W, and the facewidth of stator is Lc, and the quantity of wire casing is S on the stator, 3PW/LcS=K, 0.15≤K≤0.85.
Further, 0.2≤K≤0.8.
Said wire casing circumferentially is uniformly distributed with along said stator, and said magnetic groove group is uniformly distributed with along said periphery of rotor.
Said magnetic groove group comprises at least two magnetic grooves, in the said magnetic groove group each magnetic groove towards identical, radially arrange.
Said magnetic groove is the deep-slotted chip breaker or the U-lag of radial outward.
There is the gap between the two ends of said permanent magnet and the said magnetic groove.
Said permanent magnet is plate shaped or arc.
Said permanent magnet is an arc, the attenuation gradually of the thickness at its two ends.
Facing advantage of the present invention or principle down describes:
1, the present invention breaks through traditional thinking, and from the output torque that the angle of reluctance torque improves permagnetic synchronous motor, concrete mode is; Under the situation that permanent magnet is confirmed, the permanent-magnet torque of permagnetic synchronous motor remains unchanged basically, and mainly be to be optimized the output torque that improves permagnetic synchronous motor through the structure to permagnetic synchronous motor this moment; In other words; Under the situation that does not increase the rare earth use amount, improve permagnetic synchronous motor output torque, reduced environmental pollution, reduced production cost;
2, through experiment showed, when 0.15≤K≤0.85, can effectively improve the value of Lq-Ld, and then the output torque that improves permagnetic synchronous motor, and when 0.2≤K≤0.8, the output torque of permagnetic synchronous motor is maximum;
3, there is the gap between the two ends of said permanent magnet and the said magnetic groove, can prevents the two ends demagnetization of permanent magnet.Avoid breaking permanent magnet during assembling;
4, the thickness attenuation gradually at said permanent magnet two ends both can prevent the permanent magnet demagnetization, prevented that also permanent magnet from sliding in the magnetic groove.
Description of drawings
Fig. 1 is the cutaway view of the embodiment of the invention one said permagnetic synchronous motor;
Fig. 2 is among Fig. 1, removes the partial enlarged drawing behind coil and the permanent magnet;
Fig. 3 is the curve chart of difference in inductance Lq-Ld and K;
Fig. 4 is the cutaway view of the embodiment of the invention two said permagnetic synchronous motors;
Fig. 5 is the cutaway view of the embodiment of the invention three said permagnetic synchronous motors;
Description of reference numerals:
1, stator, 2, rotor, 3, wire casing, 4, coil, 5, magnetic groove group, 6, the magnetic groove, 7, permanent magnet, W, spacing, Lc, the facewidth.
Embodiment
Be elaborated in the face of embodiments of the invention down.
Embodiment is just like Fig. 1, shown in Figure 2, and a kind of permagnetic synchronous motor comprises stator 1 and rotor 2; Circumferentially be provided with a plurality of wire casings 3 in stator 1 upper edge; In rotor 2,, in wire casing 3, be provided with coil 4, in magnetic groove group 5, be provided with permanent magnet 7 along circumferentially being provided with a plurality of magnetic groove groups 5; The number of poles of permanent magnet 7 is P on the rotor 2, and the spacing between adjacent two magnetic groove groups 5 is W, and the facewidth of stator 1 is Lc, and the quantity of wire casing 3 is S on the stator 1,3PW/LcS=K, and 0.15≤K≤0.85 is preferably 0.2≤K≤0.8.
Wherein, permanent magnet 7 is divided into two kinds of the N utmost point and the S utmost points, and the polarity of the permanent magnet 7 in each magnetic groove group 5 is identical, and the polarity of the permanent magnet 7 in each magnetic groove group 5 is arranged alternately by NS; Said wire casing 3 circumferentially is uniformly distributed with along said stator 1, and said magnetic groove group 5 circumferentially is uniformly distributed with along said rotor 2; Said magnetic groove group 5 comprises two magnetic grooves 6, in the said magnetic groove group 5 each magnetic groove 6 towards identical, radially arrange, said magnetic groove 6 is the deep-slotted chip breaker of radial outward, permanent magnet 7 is also curved; There is the gap between the two ends of said permanent magnet 7 and the said magnetic groove 6.
Facing advantage of the present invention or principle down describes:
1, the present invention breaks through traditional thinking, and from the output torque that the angle of reluctance torque improves permagnetic synchronous motor, concrete mode is; Under the situation that permanent magnet 7 is confirmed, the permanent-magnet torque of permagnetic synchronous motor remains unchanged basically, and mainly be to be optimized the output torque that improves permagnetic synchronous motor through the structure to permagnetic synchronous motor this moment; In other words; Under the situation that does not increase the rare earth use amount, improve permagnetic synchronous motor output torque, reduced environmental pollution, reduced production cost;
2, adopting under the prerequisite of aforementioned thinking, experiment showed, when 0.15≤K≤0.85 through a large amount of; Can effectively improve the value of Lq-Ld; And then the output torque that improves permagnetic synchronous motor, preferable range is 0.2≤K≤0.8, and when K=0.4; The output torque of permagnetic synchronous motor is maximum, and is as shown in Figure 3;
3, there is the gap between the two ends of said permanent magnet 7 and the said magnetic groove 6, can prevents the two ends demagnetization of permanent magnet 7.Avoid permanent magnet 7 to break during assembling.
Under the certain situation of permanent magnet, the permanent-magnet torque of permagnetic synchronous motor is also definite basically, but through adopting the described scheme of present embodiment; Improve the value that improves Lq-Ld from the structure of permagnetic synchronous motor; Can know through following formula again, can improve the output torque of this permagnetic synchronous motor, and reduce dependence rare earth; Minimizing reduces production costs to environment damage.
T＝mp(L
q-L
d)i
di
q+mpψ
PMi
q
Embodiment two is as shown in Figure 4, and in the present embodiment, said magnetic groove group 5 comprises three magnetic grooves 6; Magnetic groove 6 is the deep-slotted chip breaker of radial outward, and permanent magnet 7 is also curved, and the thickness attenuation gradually at permanent magnet 7 two ends; The principle of present embodiment is identical with embodiment one; The thickness attenuation gradually at permanent magnet 7 two ends not only can prevent the permanent magnet demagnetization, can also prevent that permanent magnet 7 from sliding in magnetic groove 6.
Embodiment three is as shown in Figure 5, and in the present embodiment, said magnetic groove group 5 comprises two magnetic grooves 6, and magnetic groove 6 is the U-lag of radial outward; Permanent magnet 7 is the plate shaped of equal thickness, has occupied the core of magnetic groove 6, and the processing technology of plate shaped permanent magnet 7 is simple, magnetizes conveniently, and the arc-shaped permanent magnet of comparing has cost advantage.The principle of present embodiment is identical with embodiment one, repeats no more here.
More than be merely specific embodiment of the present invention, do not limit protection scope of the present invention with this; Any replacement and the improvement on the basis of not violating the present invention's design, done all belong to protection scope of the present invention.
Claims (8)
1. a permagnetic synchronous motor comprises stator and rotor, circumferentially is provided with a plurality of wire casings in the stator upper edge, in rotor, along circumferentially being provided with a plurality of magnetic groove groups, in wire casing, is provided with coil, in magnetic groove group, is provided with permanent magnet; It is characterized in that the number of poles of permanent magnet is P on the rotor, the spacing between adjacent two magnetic groove groups is W, and the facewidth of stator is Lc, and the quantity of wire casing is S on the stator, 3PW/LcS=K, 0.15≤K≤0.85.
2. permagnetic synchronous motor according to claim 1 is characterized in that 0.2≤K≤0.8.
3. permagnetic synchronous motor according to claim 1 or claim 2 is characterized in that, said wire casing circumferentially is uniformly distributed with along said stator, and said magnetic groove group is uniformly distributed with along said periphery of rotor.
4. permagnetic synchronous motor according to claim 1 or claim 2 is characterized in that said magnetic groove group comprises at least two magnetic grooves, in the said magnetic groove group each magnetic groove towards identical, radially arrange.
5. permagnetic synchronous motor according to claim 1 or claim 2 is characterized in that said magnetic groove is the deep-slotted chip breaker or the U-lag of radial outward.
6. like the said permagnetic synchronous motor of claim 5, it is characterized in that, have the gap between the two ends of said permanent magnet and the said magnetic groove.
7. like the said permagnetic synchronous motor of claim 5, it is characterized in that said permanent magnet is plate shaped or arc.
8. like the said permagnetic synchronous motor of claim 5, it is characterized in that said permanent magnet is an arc, the attenuation gradually of the thickness at its two ends.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102125900A CN102769365A (en) | 2011-07-28 | 2011-07-28 | Permanent magnet synchronous motor |
| EP11869838.0A EP2738923B1 (en) | 2011-07-28 | 2011-08-31 | Permanent magnet synchronous motor |
| PCT/CN2011/079181 WO2013013435A1 (en) | 2011-07-28 | 2011-08-31 | Permanent magnet synchronous motor |
| US14/235,408 US20140152139A1 (en) | 2011-07-28 | 2011-08-31 | Permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102125900A CN102769365A (en) | 2011-07-28 | 2011-07-28 | Permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102769365A true CN102769365A (en) | 2012-11-07 |
Family
ID=47096646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102125900A Pending CN102769365A (en) | 2011-07-28 | 2011-07-28 | Permanent magnet synchronous motor |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20140152139A1 (en) |
| EP (1) | EP2738923B1 (en) |
| CN (1) | CN102769365A (en) |
| WO (1) | WO2013013435A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780291A (en) * | 2011-08-05 | 2012-11-14 | 珠海格力电器股份有限公司 | Motor rotor and motor with same |
| CN103973060A (en) * | 2013-02-04 | 2014-08-06 | 东芝开利株式会社 | Permanent magnet motor, hermetic compressor and refrigeration cycle device |
| CN104038011A (en) * | 2014-06-03 | 2014-09-10 | 广东美芝制冷设备有限公司 | Permanent magnetic synchronous reluctance motor and compressor including same |
| US9502934B2 (en) | 2011-08-05 | 2016-11-22 | Gree Electric Appliances, Inc. Of Zhuhai | Motor rotor and motor having same |
| US9502933B2 (en) | 2011-08-05 | 2016-11-22 | Gree Electric Appliances, Inc. Of Zhuhai | Permanent magnet synchronous electric machine |
| US9502930B2 (en) | 2011-08-05 | 2016-11-22 | Gree Electric Appliances, Inc. Of Zhuhai | Motor rotor and motor having same |
| US9515526B2 (en) | 2011-08-05 | 2016-12-06 | Gree Electric Appliances, Inc. Of Zhuhai | Motor and rotor thereof |
| CN117318343A (en) * | 2023-10-10 | 2023-12-29 | 淮阴工学院 | A permanent magnet synchronous motor rotor structure with low torque ripple |
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| US9825515B2 (en) * | 2014-03-05 | 2017-11-21 | Mitsubishi Electric Corporation | Synchronous reluctance motor having radial-direction widths slit configuration on a q-axis for improved power factor |
| US10205358B2 (en) * | 2014-04-12 | 2019-02-12 | GM Global Technology Operations LLC | Electric machine for a vehicle powertrain and the electric machine includes a permanent magnet |
| JP2018153047A (en) * | 2017-03-14 | 2018-09-27 | 本田技研工業株式会社 | Rotating electrical machine rotor |
| TWM576750U (en) | 2017-07-25 | 2019-04-11 | 美商米沃奇電子工具公司 | Electrical composition, electric device system, battery pack, electric motor, motor assembly and electric motor assembly |
| US11780061B2 (en) | 2019-02-18 | 2023-10-10 | Milwaukee Electric Tool Corporation | Impact tool |
| WO2021217671A1 (en) * | 2020-04-30 | 2021-11-04 | 华为技术有限公司 | Rotor, permanent magnet motor, motor driving system and vehicle |
| CN115378162B (en) * | 2022-09-13 | 2025-06-06 | 哈尔滨工业大学 | A built-in permanent magnet synchronous motor with permanent magnets embedded on the rotor surface |
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| CN1388625A (en) * | 2001-05-25 | 2003-01-01 | 株式会社日立制作所 | Permanent magnet rotary motor and air conditioner with the same motor |
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- 2011-07-28 CN CN2011102125900A patent/CN102769365A/en active Pending
- 2011-08-31 US US14/235,408 patent/US20140152139A1/en not_active Abandoned
- 2011-08-31 EP EP11869838.0A patent/EP2738923B1/en active Active
- 2011-08-31 WO PCT/CN2011/079181 patent/WO2013013435A1/en not_active Ceased
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| CN1505239A (en) * | 1995-05-31 | 2004-06-16 | ���µ�����ҵ��ʽ���� | Motors with built-in permanent magnets |
| US20050110355A1 (en) * | 2001-03-07 | 2005-05-26 | Aisin-Seiki Kabushiki Kaisha | Synchronous reluctance motor |
| US6703744B2 (en) * | 2001-04-20 | 2004-03-09 | Denso Corporation | Generator-motor for vehicle |
| CN1388625A (en) * | 2001-05-25 | 2003-01-01 | 株式会社日立制作所 | Permanent magnet rotary motor and air conditioner with the same motor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780291A (en) * | 2011-08-05 | 2012-11-14 | 珠海格力电器股份有限公司 | Motor rotor and motor with same |
| US9502934B2 (en) | 2011-08-05 | 2016-11-22 | Gree Electric Appliances, Inc. Of Zhuhai | Motor rotor and motor having same |
| US9502933B2 (en) | 2011-08-05 | 2016-11-22 | Gree Electric Appliances, Inc. Of Zhuhai | Permanent magnet synchronous electric machine |
| US9502930B2 (en) | 2011-08-05 | 2016-11-22 | Gree Electric Appliances, Inc. Of Zhuhai | Motor rotor and motor having same |
| US9515526B2 (en) | 2011-08-05 | 2016-12-06 | Gree Electric Appliances, Inc. Of Zhuhai | Motor and rotor thereof |
| CN103973060A (en) * | 2013-02-04 | 2014-08-06 | 东芝开利株式会社 | Permanent magnet motor, hermetic compressor and refrigeration cycle device |
| CN104038011A (en) * | 2014-06-03 | 2014-09-10 | 广东美芝制冷设备有限公司 | Permanent magnetic synchronous reluctance motor and compressor including same |
| CN117318343A (en) * | 2023-10-10 | 2023-12-29 | 淮阴工学院 | A permanent magnet synchronous motor rotor structure with low torque ripple |
| CN117318343B (en) * | 2023-10-10 | 2024-08-23 | 淮阴工学院 | Permanent magnet synchronous motor rotor structure with low torque pulsation |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2738923A4 (en) | 2016-02-24 |
| US20140152139A1 (en) | 2014-06-05 |
| WO2013013435A1 (en) | 2013-01-31 |
| EP2738923B1 (en) | 2018-07-18 |
| EP2738923A1 (en) | 2014-06-04 |
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Application publication date: 20121107 |